Antioxidant Activity of Piperlactam S: Prevention of Copper-Induced LDL Peroxidation and Amelioration of Free Radical-Induced Oxidative Stress of Endothelial Cells - Tsai, Jeng-Yan; Chou, Cheng-Jeng; Chen, Chieh-Fu; Chiou, Wen-Fei (Planta Medica, 2003)